72537763 has 4 divisors (see below), whose sum is σ = 76355560. Its totient is φ = 68719968.

The previous prime is 72537749. The next prime is 72537823. The reversal of 72537763 is 36773527.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72537763 - 2⁹ = 72537251 is a prime.

It is a super-2 number, since 2×72537763² = 10523454122088338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72537743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1908870 + ... + 1908907.

It is an arithmetic number, because the mean of its divisors is an integer number (19088890).

Almost surely, 2^72537763 is an apocalyptic number.

72537763 is a deficient number, since it is larger than the sum of its proper divisors (3817797).

72537763 is a wasteful number, since it uses less digits than its factorization.

72537763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3817796.

The product of its digits is 185220, while the sum is 40.

The square root of 72537763 is about 8516.9104139940. The cubic root of 72537763 is about 417.0499300916.

The spelling of 72537763 in words is "seventy-two million, five hundred thirty-seven thousand, seven hundred sixty-three".